US5103063AExpiredUtility

Intermediates useful for the chiral isoprenylation of aldehydes

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Assignee: ALDRICH CHEM CO INCPriority: Aug 3, 1990Filed: Aug 3, 1990Granted: Apr 7, 1992
Est. expiryAug 3, 2010(expired)· nominal 20-yr term from priority
Inventors:Herbert C. Brown
C07F 5/027C07C 33/30C07C 33/02
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PatentIndex Score
0
Cited by
2
References
4
Claims

Abstract

An improved process for preparing either optically pure enantiomer of the bark beetle pheromones ipsenol and ipsdienol is provided. The process is also applicable to the condensation of aldehydes of widely varying properties to the corresponding chiral alcohol. This invention also concerns novel intermediates R' 2 B(2'-isoprenyl) wherein R' is isopinocampheyl, 2-isocaranyl and 4-isocaranyl.

Claims

exact text as granted — not AI-modified
I claim: 
     
       1.  d  B-2'-Isoprenyldiisopinocampheylborane. 
     
     
       2.  l  B-2'-Isoprenyldiisopinocampheylborane. 
     
     
       3.  d  B-2'-Isoprenyl-bis(2-isocaranyl)borane. 
     
     
       4.  d  B-2'-Isoprenyl-bis(4-isocaranyl)borane.

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